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Re: Phase Plot of Simple Harmonic Motion using Mathematica ??

  • To: mathgroup at smc.vnet.net
  • Subject: [mg126506] Re: Phase Plot of Simple Harmonic Motion using Mathematica ??
  • From: DC <b.gatessucks at gmail.com>
  • Date: Wed, 16 May 2012 04:20:31 -0400 (EDT)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • References: <jot5nd$aok$1@smc.vnet.net>

I would change the definition of solution so it's a simple function of t, then you'd take its derivative/do the plot in the usual way.

solution[t_] = 
 NDSolve[{x''[t] + k/m x[t] == 0, x[0] == 5, x'[0] == 0}, 
   x[t], {t, 0, 250}][[1, 1, 2]]
ParametricPlot[{solution[t], solution'[t]}, {t, 0, 100}]



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